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[vulkan] Fine-tuning of frame pacing logic (#3628)

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It makes fine adjustments to the frame pacing, ensuring better stability and precision.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3628
Reviewed-by: crueter <crueter@eden-emu.dev>
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Co-authored-by: MaranBr <maranbr@outlook.com>
Co-committed-by: MaranBr <maranbr@outlook.com>
This commit is contained in:
MaranBr 2026-03-02 02:53:01 +01:00 • committed by crueter
parent b5f9f8b743
commit ea209e6dab
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GPG key ID: 425ACD2D4830EBC6
1 changed files with 28 additions and 19 deletions
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47
src/video_core/renderer_vulkan/vk_scheduler.h
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@ -16,8 +16,8 @@
#include "common/alignment.h"
#include "common/common_types.h"
#include "common/settings.h"
#include "common/polyfill_thread.h"
#include "common/settings.h"
#include "video_core/renderer_vulkan/vk_master_semaphore.h"
#include "video_core/vulkan_common/vulkan_wrapper.h"
@ -114,29 +114,36 @@ public:
/// Waits for the given GPU tick, optionally pacing frames.
void Wait(u64 tick, double target_fps = 0.0) {
if (Settings::values.use_speed_limit.GetValue() && target_fps > 0.0) {
const auto now = std::chrono::steady_clock::now();
if (start_time == std::chrono::steady_clock::time_point{} || current_target_fps != target_fps) {
start_time = now;
frame_counter = 0;
current_target_fps = target_fps;
}
frame_counter++;
std::chrono::duration<double> frame_interval(1.0 / current_target_fps);
auto target_time = start_time + frame_interval * frame_counter;
if (target_time > now) {
std::this_thread::sleep_until(target_time);
} else {
start_time = now;
frame_counter = 0;
}
}
if (tick > 0) {
if (tick >= master_semaphore->CurrentTick()) {
Flush();
}
master_semaphore->Wait(tick);
}
if (Settings::values.use_speed_limit.GetValue() && target_fps > 0.0) {
auto now = std::chrono::steady_clock::now();
if (last_target_fps != target_fps) {
frame_interval = std::chrono::duration_cast<std::chrono::steady_clock::duration>(std::chrono::duration<double>(1.0 / target_fps));
max_frame_count = static_cast<int>(0.1 * target_fps);
last_target_fps = target_fps;
frame_counter = 0;
start_time = now;
}
frame_counter++;
auto target_time = start_time + frame_interval * frame_counter;
if (target_time >= now) {
auto sleep_time = target_time - now;
if (sleep_time > std::chrono::milliseconds(15)) {
std::this_thread::sleep_for(sleep_time - std::chrono::milliseconds(1));
}
while (std::chrono::steady_clock::now() < target_time) {
std::this_thread::yield();
}
} else if (frame_counter > max_frame_count) {
frame_counter = 0;
start_time = now;
}
}
}
/// Returns the master timeline semaphore.
@ -281,9 +288,11 @@ private:
std::condition_variable_any event_cv;
std::jthread worker_thread;
std::chrono::steady_clock::duration frame_interval{};
std::chrono::steady_clock::time_point start_time{};
double last_target_fps{};
u64 max_frame_count{};
u64 frame_counter{};
double current_target_fps{};
};
} // namespace Vulkan